Features: Clip-on tuner for chromatic/ guitar/ bass/ ukulele/ violin. With high definition color screen showing tuning status(blue-in tune yellow-flat red-sharp). Super fast and accurate tuning performance. 360 degrees rotatable clip enables you to adjust the viewing angle freely. If there is no signal inputs in 3 minutes the tuner will turn of automatically to save power. Specifications: Brand: Vistreck Model: AT-11 Color: Black Tuning Items: Guitar(G)/ Bass(B)/ Ukulele(U)/ Violin(V) : 440Hz Tuning Accuracy: ±0.5 cent Power Supply: Built-in CR1632 battery Item Weight: 12g/ 0.4oz Package Size: 6 * 3.5 * 3.5cm/ 2.4 * 1.4 * 1.4in Package Weight: 20g/ 0.7oz Note: The instrument showed in the picture is not included. Package List: 1 * Tuner 1 * User Manual(English & Chinese)